U.S. patent number 3,866,618 [Application Number 05/430,610] was granted by the patent office on 1975-02-18 for nail file.
Invention is credited to Sakichi Tsukamoto.
United States Patent |
3,866,618 |
Tsukamoto |
February 18, 1975 |
Nail file
Abstract
The present invention relates to a nail file comprising a pair
of file members backed with perforated plastic layers respectively
and an adhesive mixed with a hardener, to connect the said pair of
file members, wherein the said nail file has upper and lower filing
surfaces on both sides thereof and the said adhesive becomes itself
a core between the entire rear surfaces of said pair of file
members. The nail file according to the present invention has the
advantages that by proper selection of the kind and quantity of the
hardener and by proper adjustment of the width of the core the
product can have desired rigidity, flexibility and resiliency to
match finger nails of a variety of configurations.
Inventors: |
Tsukamoto; Sakichi (Nerima-ku,
Tokyo, JA) |
Family
ID: |
23708294 |
Appl.
No.: |
05/430,610 |
Filed: |
January 4, 1974 |
Current U.S.
Class: |
132/76.4 |
Current CPC
Class: |
A45D
29/04 (20130101) |
Current International
Class: |
A45D
29/04 (20060101); A45D 29/00 (20060101); A45d
029/04 () |
Field of
Search: |
;132/76.4,76.2,76.5,75.6,73,75.3,75.8 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: McNeill; G. E.
Attorney, Agent or Firm: Waters, Roditi, Schwartz &
Nissen
Claims
1. A nail file comprising a pair of file members backed with
resilient perforated plastic layers respectively and an adhesive
mixed and kneaded with a hardener to connect the said pair so that
the said nail file has upper and lower filing surfaces on both
sides thereof and the said adhesive becomes itself a core between
the entire rear surfaces of said
2. A nail file as claimed in claim 1 wherein each of the pair of
file
3. A nail file as claimed in claim 1 wherein each of the pair of
file
4. A nail file as claimed in claim 1 wherein the adhesive is well
mixed and kneaded with a hardnener comprising any mixture of talc,
lime powder, alumina, mica, diatomaceous earth, glass powder,
flocks and asbestos.
Description
The present invention relates to a nail file, and more particularly
to a nail file provided with upper and lower filing surfaces on
both sides thereof, without a separate core other than an
adhesive.
The present invention comprises a pair of file members made of
emery paper or cloth backed with resilient perforated plastic
layers respectively and a specific adhesive to connect said layers
together to form a nail file having upper and lower filing
surfaces. The adhesive is mixed with hardening materials such as
talc, lime powder, flocks and asbestos, etc. and is applied in such
a manner that a core of desired width is formed between the upper
and lower file members backed with perforated plastic layers.
Heretofore, in the case of the conventional nail file of this kind
a separate core member was used between the rear surfaces of both
upper and lower file members to be sticked thereto, with a suitable
adhesive. Accordingly, the finished product lacked flexibility or
rigidity, as the case may be, due to the nature and kind of the
core member used.
On the other hand, the nail file of the present invention is
characterized in that since a specific adhesive is used as a
substitute for the core member as aforesaid it is possible to
obtain a finished nail file of desired flexibility and rigidity by
selecting the proper kind and amount of the hardener to be mixed
and kneaded with the adhesive and by adjusting the width of the
core to be formed by the adhesive, and to give the nail file a
longer life.
Accordingly, an object of the present invention is to provide a
nail file comprising a pair of file members made of emery paper or
cloth backed with resilient perforated plastic layers, and a
specific adhesive without using a core member separately.
Another object of the present invention is to provide a nail file
of desired flexibility and rigidity which is well matched to
fingernails of a variety of configurations.
Still another object of the present invention is to provide a nail
file which is capable of being manufactured in a single process of
sticking the file members without using a specific core.
The present invention will now be explained in detail with
reference to the accompanying drawing in which FIG. 1 shows a
perspective view of a nail file according to the present invention
partly in section.
Referring to FIG. 1, a pair of file members 1 and 2 comprise a
sheet of rough emery paper or cloth, of lower count and a sheet of
fine emery paper or cloth, of higher count respectively, backed
with resilient perforated plastic layers 3 and 3' such as
polyurethane, polystyrene or polyvinyl chloride. The file members 1
and 2 are sticked together by an adhesive 5 with their rear
surfaces facing opposite to each other thereby forming a finished
nail file having both upper and lower filing surfaces. The adhesive
5 contains a hardener 4 comprising any mixture of talc, lime
powder, alumina, mica, diatomaceous earth, glass powder, flocks and
asbestos well mixed and kneaded to become suitable for the adhesion
of plastic materials selected from polyester, neoprene or vinyl. In
sticking together the said file members 1 and 2 the adhesive may be
so used that it becomes itself a core a of desired width having
sufficient resiliency, flexibility and rigidity between the entire
rear surfaces of the said both file members, that is, the plastic
layers 3 and 3'.
Thus, the nail file of the present invention has, as explained
above, various advantages that by proper selection of the kind and
quantity of the hardener as well as by proper adjustment of the
width of the core to be formed by the adhesive a product of desired
rigidity and flexibility can be obtained, that since the formation
of the core and adhesion of the plastic layers are made in a single
step the manufacturing process becomes quite simple, and further
that due to the rigidity and flexibility of the core and the
resiliency of the plastic layers the product can be well matched to
a variety of configurations of finger nails whereby nail polishing
can be done quite efficiently.
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